Ranunculus aquatilis
Ranunculus cardiophyllus
white western buttercup, water crowfoot, white water crowfoot
heart-leaf buttercup
Leaves alternate, the submerged ones 3-7 times trichotomously or dichotomously dissected into filiform segments; floating leaves similar, or simple, 5-15 mm. long and twice as broad, 3-lobed and toothed.
Pedicels stout, 2-6 cm. long, recurved in fruit;
sepals 5, membranous, 2-5 mm. long;
petals 5, white, 5-10 mm. long;
nectary scale very small, forming a minute pocket;
receptacle globose, hairy;
stamens 10-15;
pistils 12-15.
Achenes 1.5-2 mm. long, thin-margined, compressed; stylar beak 0.6 mm. long, deciduous.
Ranunculus aquatilis
Ranunculus cardiophyllus
Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.
Reported from northeastern Washington, but no specimens have been seen; eastern British Columbia, south in the Rocky Mountains to Arizona and New Mexico, east to Alberta and the northern Great Plains.
- Local floras:
BC, 
CA, 
OR, 
WA - Local Web sites: CalFlora, CalPhotos,
Flora NW, 
PNW Herbaria, Turner Photog. 
WildflowerSearch
iNaturalist (observations)
USDA Plants Database- LBJ Wildflower Center
- SEINet
- Plants of the World Online
- Encyclopedia of Life
- Wikipedia
- Google Image Search
